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11 August, 16:23
4x+2y=20 and 3x-y=10
Which coordinate solves both equations.
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Heather Gay
11 August, 16:41
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4x + 2y = 20
3x - y = 10
Multiplying second equation by 2.
6x - 2y = 20
Adding to the first,
10x = 40
x = 4
y = 3x - 10 = 3 (4) - 10 = 2
Answer: (4, 2)
Check:
4 (4) + 2 (2) = 16+4 = 20, good
3 (4) - 2 = 12 - 2 = 10, good
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